Malicious PDF — malware analysis report

Static analysis result for SHA-256 22e7d3b77da1b61d…

MALICIOUS

PDF

45.1 KB Created: 2021-05-11 15:41:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 2bf114385733b0251f90e3ae7455b655 SHA-1: a954a1fbdb7ca71361adc36707625431c067586f SHA-256: 22e7d3b77da1b61d4357c2ef403ebd5191db9cff79d496688435dec89a76865c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'free spins'. The heuristic firings confirm these links are associated with malicious redirectors and game hack lures. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to trick users into visiting malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9621

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.xyz/app/406889139/coin-master-free-spins-and-coins-link-today-game-hack In PDF document text
    • http://dobrovodie.ru/images/free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://dobrovodie.ru/images/roblox-bloxburg-free-money_GM431946152.pdfIn PDF document text
    • http://dobrovodie.ru/images/how-do-we-get-free-robux_GM431946152.pdfIn PDF document text
    • http://dobrovodie.ru/images/how-to-get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://dobrovodie.ru/images/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://dobrovodie.ru/images/coin-master-heaven-free-spins_GM406889139.pdfIn PDF document text
    • http://dobrovodie.ru/images/free-robux-kid-friendly_GM431946152.pdfIn PDF document text
    • http://dobrovodie.ru/images/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://dobrovodie.ru/images/coin-master-mod-apk_GM406889139.pdfIn PDF document text
    • http://dobrovodie.ru/images/coin-master-reward-link_GM406889139.pdfIn PDF document text
    • http://dobrovodie.ru/images/coin-master-heaven-free-spins-today_GM406889139.pdfIn PDF document text
    • http://dobrovodie.ru/images/coinmasterfree_GM406889139.pdfIn PDF document text
    • http://dobrovodie.ru/images/free-robux-com-2021_GM431946152.pdfIn PDF document text
    • http://dobrovodie.ru/images/coin-master-card-collection-link_GM406889139.pdfIn PDF document text
    • http://dobrovodie.ru/images/www-robux-us_GM431946152.pdfIn PDF document text
    • http://dobrovodie.ru/images/how-do-i-get-robux_GM431946152.pdfIn PDF document text
    • http://dobrovodie.ru/images/how-to-get-free-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • http://dobrovodie.ru/images/roblox-hack-scripts-pastebin_GM431946152.pdfIn PDF document text
    • http://dobrovodie.ru/images/today-coin-master-spin-free_GM406889139.pdfIn PDF document text
    • http://dobrovodie.ru/images/coin-master-hack-software-download_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000499a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x499A 25144 bytes
SHA-256: 75c80cbecf7e277267130e22797e21c36094b8cd6c3d6837d2fa9cbcdccc5f5d
font_01_sfnt_off00008383.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8383 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008d35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D35 18412 bytes
SHA-256: 5606d742d49c2f618a839db89fb2f395f675f912dcc06d31cfc3972fb9700339

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